Expert cartridge loader
=======================
info by Fabrizio Gennari
Used by the Trilogic Expert cartridge to save freezed games. Also some commercial games (Eye of Horus...) use it
Encoding:
---------
Threshold: $141 (321) clock cycles
Bit 0: TAP byte $1F
Bit 1: TAP byte $33
Data Endianess: MOST Significant bit First
Lead-In Byte : $0F
Sync sequence: $0E, $0D, $0C, $0B, $0A, $09, $08, $07, $06, $05, $04, $03, $02, $01, $00
Structure:
----------
The length of the block is calculated from Start and End address, which is
written at the start of the block (after the SYNC Byte):
00 Start Address of data (Low, High byte)
02 End Address of data (Low, High byte)
04 Data
05 Checksum (sum of the Data bytes + 1 for each Data byte, modulo $100 (256))
               (
geocities.com/siliconvalley/platform/8224)                   (
geocities.com/siliconvalley/platform)                   (
geocities.com/siliconvalley)